.page-faq {
  --faq-panel: rgba(21, 48, 43, 0.52);
  --faq-panel-2: rgba(17, 20, 23, 0.92);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 5vw, 52px) 0 clamp(44px, 6vw, 76px);
  background-image: radial-gradient(72% 86% at 6% 0%, rgba(53, 224, 200, 0.11), transparent 62%);
  background-repeat: no-repeat;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 3.6vw, 46px);
  align-items: center;
  margin-top: clamp(18px, 3vw, 34px);
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--ink-1);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-size: clamp(38px, 8vw, 62px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 52ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--snow);
  opacity: 0.84;
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 场景入口条 ---------- */
.page-faq .faq-scenes {
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-faq .faq-scenes__title {
  margin: 0;
  font-size: clamp(20px, 3.4vw, 27px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.page-faq .faq-scenes__lead {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mute);
}

.page-faq .faq-scenes__strip {
  display: flex;
  gap: 12px;
  margin-top: 26px;
  padding-bottom: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-chip {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 172px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--faq-panel), var(--faq-panel-2));
  color: var(--snow);
  text-decoration: none;
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--lime);
  transform: translateY(-2px);
}

.page-faq .faq-chip__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-faq .faq-chip__label {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .faq-chip__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mute);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-shell {
  display: block;
}

.page-faq .faq-index {
  display: none;
}

.page-faq .faq-flow {
  min-width: 0;
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-block {
  padding-top: clamp(38px, 5.5vw, 68px);
  scroll-margin-top: calc(var(--hdr-sm) + 26px);
}

.page-faq .faq-block:first-child {
  padding-top: 0;
}

.page-faq .faq-block + .faq-block {
  border-top: 1px solid var(--line);
}

.page-faq .faq-block__head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.page-faq .faq-block__no {
  flex: none;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-faq .faq-block__title {
  margin: 0;
  padding-left: 12px;
  border-left: 3px solid var(--lime);
  font-size: clamp(21px, 3.2vw, 29px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.page-faq .faq-block__lead {
  margin: 10px 0 0;
  padding-left: 15px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mute);
}

/* ---------- 单条问答 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line);
  transition: background 0.22s var(--ease);
}

.page-faq .qa[open] {
  background: var(--faq-panel);
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 13px;
  align-items: start;
  padding: 18px 14px;
  cursor: pointer;
  list-style: none;
}

.page-faq .qa__summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa__summary::marker {
  content: "";
}

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-faq .qa__q {
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--snow);
}

.page-faq .qa__icon {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 6px;
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  background: var(--teal);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-faq .qa__icon::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .qa__icon::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

.page-faq .qa[open] .qa__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 2px 16px 24px 16px;
  background: var(--ink-1);
  border-left: 3px solid var(--lime);
}

.page-faq .qa__intro {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mute);
}

.page-faq .qa-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .qa-steps__item {
  position: relative;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 14px;
  padding: 9px 0;
}

.page-faq .qa-steps__item::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 35px;
  bottom: -9px;
  width: 1px;
  background: var(--line-2);
}

.page-faq .qa-steps__item:last-child::before {
  content: none;
}

.page-faq .qa-steps__no {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  background: rgba(53, 224, 200, 0.07);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--teal);
}

.page-faq .qa-steps__text {
  font-size: 15px;
  line-height: 1.76;
  color: var(--snow);
  opacity: 0.9;
}

.page-faq .qa-steps__text a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa-steps__text a:hover {
  color: var(--lime);
}

/* ---------- 章节配图 ---------- */
.page-faq .faq-figure {
  display: grid;
  gap: 14px;
  margin: 26px 0 4px;
}

.page-faq .faq-figure__media {
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--ink-1);
}

.page-faq .faq-figure__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure__caption {
  padding-left: 12px;
  border-left: 2px solid var(--teal);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-faq .qa__summary {
    padding: 20px 18px;
  }

  .page-faq .qa__body {
    padding: 2px 22px 26px 67px;
  }

  .page-faq .faq-figure {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 26px;
    align-items: center;
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-shell {
    display: grid;
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-index {
    display: block;
    position: sticky;
    top: calc(var(--hdr-sm) + 30px);
    padding-right: 4px;
  }

  .page-faq .faq-index__title {
    margin: 0 0 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--mute);
  }

  .page-faq .faq-index__list {
    margin: 0;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-index__link {
    display: flex;
    gap: 10px;
    align-items: baseline;
    padding: 11px 10px 11px 12px;
    border-left: 2px solid transparent;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
    line-height: 1.5;
    color: var(--mute);
    text-decoration: none;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
  }

  .page-faq .faq-index__link:hover {
    color: var(--snow);
  }

  .page-faq .faq-index__link.is-active,
  .page-faq .faq-index__link[aria-current] {
    color: var(--snow);
    border-left-color: var(--lime);
    background: rgba(198, 255, 61, 0.06);
  }

  .page-faq .faq-index__no {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--teal);
  }

  .page-faq .faq-index__note {
    margin: 16px 0 0;
    font-size: 13px;
    line-height: 1.7;
    color: var(--mute);
  }

  .page-faq .faq-block:first-child {
    padding-top: 0;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-shell {
    grid-template-columns: 260px minmax(0, 1fr);
  }

  .page-faq .qa__q {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .qa,
  .page-faq .qa__icon::before,
  .page-faq .qa__icon::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}